مورد إلكتروني
A More Efficient Search for H2O Megamaser Galaxies: The Power of X-Ray and Mid-infrared Photometry
| العنوان: | A More Efficient Search for H2O Megamaser Galaxies: The Power of X-Ray and Mid-infrared Photometry |
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| المصدر: | The Astrophysical Journal |
| بيانات النشر: | IOP Publishing 2020 |
| تفاصيل مُضافة: | Kuo, C Y Hsiang, J Y Chung, H H Constantin, A Chang, Y Y da Cunha, Elisabete Pesce, D Chien, W T Chen, B Y Braatz, J A Zaw, Ingyin Matsushita, S Lin, J C |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | We present a new investigation of the dependence of H2O maser detection rates and properties on the mid-IR AGN luminosity, L_AGN, and the obscuring column density, N_H, based on mid-IR and hard X-ray photometry. Based on spectral energy distribution fitting that allows for decomposition of the black hole accretion and star-formation components in the mid-infrared, we show that the megamaser (disk maser) detection rate increases sharply for galaxies with 12 micron AGN luminosity L^{AGN}_{12 micron} greater than 10^42 erg/s, from ~<3%(~<2%) to ~12%(~5%). By using the ratio of the observed X-ray to mid-IR AGN luminosity as an indicator of N_H, we also find that the megamaser (disk maser) detection rates are boosted to 15%(7%) and 20%(9%) for galaxies with N_H >= 10^23 cm^{-2} and N_H >= 10^{24} cm^{-2}, respectively. Combining these column density cuts with a constraint for high L^{AGN}_{12 micron} (>=10^42 erg/s) predicts further increases in the megamaser (disk maser) detection rates to 19%(8%) and 27%(14%), revealing unprecedented potential boosts of the megamaser and disk maser detection rates by a factor of 7-15 relative to the current rates, depending on the chosen sample selection criteria. A noteworthy aspect of these new predictions is that the completeness rates are only compromised mildly, with the rates remaining at the level of ~95%(~50%) for sources with N_H >= 10^{23} cm^{-2} (N_H >= 10^24 cm^-2). Applying these selection methods to the current X-ray AGN surveys predicts the detection of >~15 new megamaser disk |
| مصطلحات الفهرس: | Megamasers, Astrophysical masers, Active galactic nuclei, Active galaxies, X-ray active galactic nuclei, X-ray surveys, Surveys, Broad band photometry, Infrared photometry, Journal article |
| URL: | |
| الإتاحة: | Open access content. Open access content © 2020. The American Astronomical Society. |
| ملاحظة: | en_AU |
| أرقام أخرى: | AUANP oai:openresearch-repository.anu.edu.au:1885/268678 0004-637X 1347190541 |
| المصدر المساهم: | AUSTRALIAN NAT UNIV - PRINT REPOSITORY From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1347190541 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |